2221112221877 has 2 divisors, whose sum is σ = 2221112221878. Its totient is φ = 2221112221876.

The previous prime is 2221112221859. The next prime is 2221112221931. The reversal of 2221112221877 is 7781222111222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177678573681 + 1043433648196 = 1085209^2 + 1021486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221112221877 - 2¹² = 2221112217781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221112221877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221112251877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110556110938 + 1110556110939.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556110939).

Almost surely, 2^{2221112221877} is an apocalyptic number.

It is an amenable number.

2221112221877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221112221877 is an equidigital number, since it uses as much as digits as its factorization.

2221112221877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 38.

The spelling of 2221112221877 in words is "two trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, eight hundred seventy-seven".